I got Crysis / Warhead working with SLi now, I uninstalled the display drivers then reinstalled them and it works. I think nHancer did something or I did when I added arma2.exe to the list of exe's for Crysis.

EVGA Enhancement patch 13 still doesn't work nor does ArmA and I don't want to use nHancer again so I don't repeat the mistake.

Is there a fix for steam games showing up in the installed programs list or a way to make the enhancement patch work?